CN107002614A - Pump, especially high-pressure fuel pump - Google Patents

Pump, especially high-pressure fuel pump Download PDF

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Publication number
CN107002614A
CN107002614A CN201580068162.1A CN201580068162A CN107002614A CN 107002614 A CN107002614 A CN 107002614A CN 201580068162 A CN201580068162 A CN 201580068162A CN 107002614 A CN107002614 A CN 107002614A
Authority
CN
China
Prior art keywords
cam
pump
conveyor zones
conveying
drive shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201580068162.1A
Other languages
Chinese (zh)
Other versions
CN107002614B (en
Inventor
G·韦斯特恩
J·施内克
O·米勒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of CN107002614A publication Critical patent/CN107002614A/en
Application granted granted Critical
Publication of CN107002614B publication Critical patent/CN107002614B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0413—Cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/06—Control
    • F04B1/066—Control by changing the phase relationship between the actuating cam and the distributing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing
    • F04B49/243—Bypassing by keeping open the inlet valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0076—Piston machines or pumps characterised by having positively-driven valving the members being actuated by electro-magnetic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Reciprocating Pumps (AREA)

Abstract

Pump, especially high-pressure fuel pump, with least one pump element (10), it has by with least one cam (16；160) drive shaft is driven to the pump piston (12) moved back and forth, the pump piston gauge pump working chamber (24), the pump working chamber by the pump piston (12) intake stroke when can by enter valve (26) be filled with pumped (conveying) medium.At least one cam (60 of drive shaft (14)；160) it is multiple cam conveyor zones (16a with the conveying stroke for pump piston (12), the multiple substances or multiple cam (160) being arranged side by side on multiple cam 16b) or the direction provided with the rotation axis (15) along drive shaft (14), it has at least one cam conveyor zones (160a respectively；160b) it is used for the conveying stroke of pump piston (12).The cam contour of the cam conveyor zones (16a, 16b) of at least one multiple cam (16) or the cam conveyor zones (160a of substance cam (160)；Cam contour 160b) is configured to difference.

Description

Pump, especially high-pressure fuel pump
Technical field
Pump of the invention from claim 1 type, especially high-pressure fuel pump sets out.
Background technology
This pump in high-pressure fuel pump form passes through known to the A1 of DE 10 2,013 206 025.This pump has at least One pump element, the pump element has pump piston, and it is driven to carry out back and forth by the drive shaft with least one cam Motion.The pump piston gauge pump working chamber, the pump working chamber can be by being inflated in the intake stroke of pump piston into valve Fuel.The cam configuration of drive shaft is the multiple cam of dual cam form and correspondingly has two cam conveyor zones. In addition, rotation axis direction of two cams along drive shaft is arranged side by side.Cam conveyor zones are herein in terms of its cam contour All construct in the same manner, i.e. the position with identical cam lift and the cam gradient and top dead-centre on the drive shaft anglec of rotation Put identical.All cam conveyor zones are used for fuel high pressure conveying so that herein in the absence of flexibility.
In addition, by a kind of high-pressure fuel pump known to the A1 of DE 196 44 915, it has pump element, and the pump element has Pump piston, the pump piston is driven to move back and forth by the drive shaft with cam.The entrance valve of pump element herein can Enough electricity are manipulated, with the change for the conveying capacity for making it possible to realize high-pressure fuel pump.
The content of the invention
And this have the advantage that according to the pump with claim 1 feature of the present invention, by cam conveyor zones not With cam contour make it possible to realize flexibility in terms of fuel high pressure conveying.It can for example be joined herein according to the operation of internal combustion engine Number, such as load or rotating speed, and it is various combination of the conveying using different cam contour and cam contour.For example, wherein one Individual cam contour may be configured to small conveying capacity demand and another cam contour may be configured to big conveying capacity demand.
The favourable configuration and expansion scheme of the pump of the present invention are provided in the dependent claims.In claim 2 to 4 Provide the different possibilities of the different configuration of cam contour.Construction according to claim 6 this have the advantage that, by that electric can grasp Vertical entrance valve is easily determined to be used to which cam conveyor zones convey and any of cam conveyor zones can be used Part and any combination.
Brief description of the drawings
It is shown in the drawings in two embodiments of the present invention and description below and explains in detail.
Fig. 1 partly shows the cross sectional view of pump according to first embodiment,
Fig. 2 to 4 illustrates the cam of pump to amplify, and different cam conveyor zones are used to convey by the cam,
Fig. 5 shows the sectional side elevation of pump according to second embodiment, and
Fig. 6 shows there is different cams according to opposite two cam of the pump of second embodiment, the two cams Conveyor zones.
Embodiment
Pump according to first embodiment is partly shown with simplification figure in Fig. 1, the pump is preferably used to automotive fuel The high-pressure fuel pump of injection apparatus.The pump has at least one pump element 10, and the pump element has pump piston 12, the pump piston again It is driven to move back and forth at least indirectly by drive shaft 14.Drive shaft 14 has cam 16, will be driven by the cam The rotary motion of moving axis 14 is converted into the reciprocating motion of pump piston 12.Pump piston 12 is supported on the convex of drive shaft 14 by push rod 18 On wheel 16.Can be provided with the multiple pump elements 10 arranged to distribution on the periphery of drive shaft 14, their pump piston 12 is by same One cam 16 drives.
Pump element 10 has housing 20, and pump piston 12 is closely directed in cylindrical hole 22 in the housing, wherein, shell Body portion 20 is referred to hereinbelow as cylinder head.Pump piston 12 by its away from drive shaft 14 end in cylindrical hole 22 gauge pump work Make room 24.Pump working chamber 24 is by entering valve 26 with the connecting portion with entrance 28, radial direction of the pump working chamber 24 in pump piston 12 Fuel is inflated in the intake stroke pointed to inward towards drive device 14.Pump working chamber 24 also has with going out by dump valve 30 The connecting portion of mouth 32, the dump valve is, for example, the discharge check-valves opened with going out from pump working chamber 24, and the outlet can lead to height Press memory 34 and by the outlet in the conveying stroke that pump piston 12 is radially outward pointed to leaving from drive device 14 Fuel is extruded from pump working chamber 24.
The cam 16 of drive shaft 14 is configured to multiple cam, such as dual cam.Dual cam 16 has two in the circumferential Individual cam the conveyor zones 16a and 16b mutually staggered, they are respectively equipped with the cam contour of restriction.Cam conveyor zones 16a, 16b is the region below of dual cam 16, cause in that region pump piston 12 from drive shaft 14 point to leaving it is defeated See off journey, fuel is forced out from pump working chamber 24 in the conveying stroke.Between cam conveyor zones 16a, 16b, dual Cam suction areas 16c, 16d are constructed on cam, pump piston 12 is carried out towards driving by back-moving spring 19 in that region The intake stroke that axle 14 is pointed to.
Arranged according to the present invention, two cam conveyor zones 16a and 16b of dual cam 16 are in their cam contour side Surface construction obtains different.Especially set herein, cam conveyor zones 16a, 16b cam contour have different cam lift h1 and h2.Additionally or alternatively, cam conveyor zones 16a, 16b cam contour can have the different cam gradients.It can also add Ground is alternatively set, the rotation of the top dead-centre OT1 and OT2 of cam conveyor zones 16a, 16b cam contour in drive shaft 14 Position in terms of angle is different.Indicated in Fig. 2 to 4 by arrow the direction of rotation of drive shaft 14.First cam conveyor zones 16a cam contour is for example with small cam lift h1, with the corresponding small cam gradient and top dead-centre OT1, i.e., most About 100 degree in drive shaft 14 of bottom dead centre UT1 when high cam protuberance from the anglec of rotation of drive shaft 14 is zero degree Anglec of rotation α 1 in the range of.Second cam conveyor zones 16b cam contour has big cam lift h2, with corresponding The big cam gradient.Top dead-centre OT2 from the anglec of rotation of drive shaft 14 be zero degree when bottom dead centre UT2 in drive shaft 14 About 90 degree of anglec of rotation α 2 in the range of.
Electric it can be manipulated into valve 26, such as by electromagnetic actuators 40.The actuator 40 is manipulated by electronic-controlled installation 46. By control device 46 asked for by sensor for the fuel high pressure pump duty needed for the current operating conditions of internal combustion engine simultaneously And correspondingly manipulate actuator 40.There are valve components 42 into valve 26, the valve components are concured with valve seat 44.In pump piston In 12 intake stroke, opened into valve so that fuel is flowed into pump working chamber 24 from entrance 28 and fills the pump work Room.It is settable, in the case of not operated actuator 40 only pass through entrance and pump working chamber during intake stroke into valve 26 Pressure difference between 24 and be opened.26 dozens, valve also can will be entered during the conveying stroke of pump piston 12 by operated actuator 40 Open.When being opened during conveying stroke of the valve in piston pump 12 is entered, then no fuel is transported to high pressure by pump piston 12 and deposited In reservoir 34, but fuel is delivered back into entrance 28.It will can be resisted by actuator 40 into valve 26 in pump working chamber 24 Pressure open.
According to the conveying capacity demand of high-pressure fuel pump, the actuator 40 that valve 26 is entered by correspondingly manipulating is defeated only by cam Send one in region 16a, 16b or convey two cam conveyor zones 16a, 16b for fuel high pressure.When high by fuel Small fuel quantity should be only transported to when in high pressure accumulator 34 (such as in the free-runing operation that internal combustion engine is not loaded) by press pump, Then only the first cam conveyor zones 16a is conveyed for fuel high pressure.Only pass through the first delivery area when pump piston 12 is located at herein When in conveying stroke caused by the 16a of domain, closed into valve 26.Conveyed into valve 26 according to conveying capacity demand in whole first cam Closed during the 16a of region or only during a first cam conveyor zones 16a part.When pump piston 12 in it passes through second When in conveying stroke caused by cam conveyor zones 16b, lasting opening is kept into valve 26 so that no fuel is transported to high pressure In memory 34.In fig. 2, the first cam conveyor zones 16a part for being used for fuel conveying is marked with A.By in internal combustion engine By mode during small load using only the first cam conveyor zones 16a, noise that can be by high-pressure fuel pump in the loading range Send and keep the load of component such as drive shaft 14 and push rod 18 small and that can equally make high-pressure fuel pump to keep small.In addition, Small torque is only needed to drive the drive shaft 14 of high-pressure fuel pump.Thus, by for the internal combustion engine needed for driving high-pressure fuel pump Parts unloaded and other parts unloadeds being also arranged in the high-pressure fuel pump in identical drivetrain.
When the conveying capacity demand of high-pressure fuel pump is higher, for example in the case of the fractional load of internal combustion engine, then not only First cam conveyor zones 16a is also conveyed the second cam conveyor zones 16b for fuel high pressure.Here, can for example use Whole first cam conveyor zones 16a, its mode is remained turned-off into valve 26.In addition the second cam conveyor zones 16b is used A part, its mode is, stroke is conveyed caused by second cam conveyor zones 16b in passing through for pump piston 12 into valve 26 Remained turned-off during a part.In figure 3, cam conveyor zones 16a, the 16b part for being used for fuel high pressure conveying are marked by B。
When the conveying capacity demand of high-pressure fuel pump is high, such as in internal combustion engine full load, then by two cam delivery areas Domain 16a, 16b are used for fuel high pressure on their whole extension yardstick and conveyed.Into the passing through in pump piston 12 herein of valve 26 Closed during whole conveying stroke caused by cam conveyor zones 16a, 16b.In Fig. 4, cam conveyor zones 16a, 16b use The part conveyed in fuel high pressure is marked with C.
By the corresponding manipulation of the actuator 40 to entering valve 26 can by cam conveyor zones 16a, 16b any combination and Cam conveyor zones 16a, 16b arbitrary portion are conveyed for fuel high pressure.Settable, only one pump element 10 passes through multiple convex Wheel 16 is manipulated.Alternatively, the multiple pump elements 10 arranged to distribution on the periphery of multiple cam 16, these pumps member be may also be arranged on Part is manipulated by multiple cam 16.Here, can be by same cam conveyor zones 16a, 16b or by different cam conveyor zones The fuel high pressure that 16a, 16b are used for pump element 10 is conveyed.
Figure 5 illustrates the high-pressure fuel pump according to second embodiment, wherein, provided with least two pump element 10a, 10b, They are arranged with mutually staggering on the direction of the rotation axis 15 of drive shaft 14 and they are by each one of drive shaft 14 Cam 160 is manipulated.There is one to enter valve 26 by each pump element 10a, 10b, and this, which enters valve, to be opened by electric actuator 40.Two Individual cam 160 is arranged with mutually staggering corresponding to pump element 10a, 10b on the direction of the rotation axis 15 of drive shaft 14.Two Individual cam 160 is illustrated and opposite with cross-sectional in figure 6, although they are as described above in the rotation axis of drive shaft 14 It is arranged side by side on 15 direction.Two cams 160 are configured to substance cam and have cam conveyor zones 160a, 160b respectively And there is cam suction areas 160c, 160d respectively.Two cam conveyor zones 160a, 160b cam contour are such as first Difference is configured in embodiment like that.The first cam conveyor zones 160a shown in Fig. 6 left sides cam contour for example with Small cam lift h1, the small cam gradient and top dead-centre OT1, the top dead-centre is on the aspects of the anglec of rotation α 1 evening ground of drive shaft 14 In the range of about 100 degree.The cam contour of the second cam conveyor zones 160b shown on the right of Fig. 6 has big cam liter Journey h2, the big cam gradient and top dead-centre OT2, the top dead-centre early are in about 90 degree at the aspects of anglec of rotation α 2 of drive shaft 14 In the range of.
According to the conveying capacity demand of high-pressure fuel pump, pass through the actuator 40 of two pump elements 10a, 10b entrance valve 26 Corresponding manipulation by the only one cam conveyor zones in cam conveyor zones 160a, 160b and thereby by only one pump element 10a is conveyed for fuel high pressure, or is used by two cam conveyor zones 160a, 160b and thereby by two pump elements 10a and 10b In fuel high pressure conveying.In the case of small conveying capacity demand, the first pump element 10a the first cam conveyor zones 160a's Only a part is used, and its mode is that pump element 10a entrance valve 26 is defeated by the first cam in affiliated pump piston 12 Send and remained turned-off during conveying stroke caused by the 160a of region.Second pump element 10b is simultaneously not involved in fuel high pressure conveying, its mode It is that the entrance valve 26 of second pump element passes through caused by the second cam conveyor zones 160b entirely in affiliated pump piston 12 Opened during conveying stroke.When the conveying capacity demand of high-pressure fuel pump is higher, additionally by the second cam conveyor zones 160b A part and thereby also the second pump element 10b is conveyed for fuel high pressure, its mode is, the second pump element 10b entrance Valve 26 is closed during the part by conveying stroke caused by the second cam conveyor zones 160b of affiliated pump element 12. When the conveying capacity demand of high-pressure fuel pump is high, two pump elements 10a, 10b entrance valve 26 are in the logical of affiliated pump element 12 Closed during crossing whole conveying stroke caused by cam conveyor zones 160a, 160b.
It may also set up in the case of the high-pressure fuel pump according to second embodiment, cam 160 and to be not configured to substance convex Take turns and be constructed to multiple cam.
Pass through the actuating of the entrance valve 26 of at least one pump element 10 described in the high-pressure fuel pump according to first embodiment The corresponding manipulation of device 40 in other words by pump element 10a in the high-pressure fuel pump according to second embodiment, 10b entrance valve 26 The corresponding manipulation of actuator 40, can be by cam conveyor zones 60a, 60b 160a in other words, and it is high that 160b any combination is used for fuel Pressure conveying.The Load Balanced of cam conveyor zones can be also distributed by alternately using different fuel conveyor zones herein, I.e. whole cam conveyor zones are with least approximately uniform frequency usage.Do not conveyed when each enters valve 26 in each cam When being manipulated in region, the quantity that can will also enter the handoff procedure of valve 26 reduces or is uniformly distributed.Cam conveyor zones 16a, 16b 160a in other words, applications of the 160b in terms of fuel high pressure conveying also can high-pressure fuel pump internal combustion engine different loads Optimized in terms of driving moment needed under state.
Also unique embodiment of high-pressure fuel pump can be used for different power requirements, its mode is, in multiple cam For example in the case of dual cam or quadruple cam, one or two in cam conveyor zones is used only for low power requirements It is individual, and required for high power using whole two or four cam conveyor zones.Thus drive shaft and pump type can be reduced Change and thus cost-effective.

Claims (6)

1. a kind of pump, especially high-pressure fuel pump, the pump have at least one pump element (10；10a, 10b), it is described at least one Pump element has pump piston (12), and the pump piston passes through with least one cam (16；160) drive shaft (14) is driven to Move back and forth, the pump piston gauge pump working chamber (24), the pump working chamber is in the intake stroke of the pump piston (12) Pumped (conveying) medium can be inflated to by entering valve (26),
Wherein, at least one described cam (60 of the drive shaft (14)；160) it is multiple cam, the multiple cam, which has, to be used In multiple cam conveyor zones (16a, 16b) of the conveying stroke of the pump piston (12), or
Wherein, provided with the multiple substances or multiple convex being arranged side by side on the direction of the rotation axis of the drive shaft (14) (15) Take turns (160), the multiple substance or multiple cam have at least one for conveying stroke for being used for the pump piston (12) respectively Cam conveyor zones (160a, 160b),
Characterized in that,
The cam contour of the cam conveyor zones (16a, 16b) of at least one multiple cam (16) is configured to difference, or
The cam contour of the cam conveyor zones (160a, 160b) of these substance cams (160) is configured to difference.
2. pump according to claim 1, it is characterised in that cam conveyor zones (16a, the 16b；160a, 160b) Cam contour has different cam lifts (hl, h2).
3. pump according to claim 1 or 2, it is characterised in that cam conveyor zones (16a, the 16b；160a, 160b) Cam contour there are the different cam gradients.
4. the pump according to one of claims 1 to 3, it is characterised in that cam conveyor zones (16a, the 16b；160a, The top dead-centre (OT1, OT2) of cam contour 160b) has different positions in terms of the anglec of rotation of the drive shaft.
5. the pump according to one of preceding claims, it is characterised in that according to the conveying capacity demand of the pump, will described in extremely A few multiple cam (16) or only single cam conveyor zones (16a, the 16b of these substance cams (160)；160a, 160b) or by its multiple cam conveyor zones (16a, 16b；160a, 160b) it is used to convey.
6. pump according to claim 5, it is characterised in that
The entrance valve (26) electric can manipulate, and
When the pump piston (12) is positioned at cam conveyor zones (16a, the 16b for being ready to use in conveying；160a, 160b) in when, it is described Closed into valve (26), and
It is described when the pump piston (12), which is located at, to be not used in the cam conveyor zones (16a, 16b, 160a, 160b) of conveying Opened into valve (26).
CN201580068162.1A 2014-12-16 2015-10-27 Pump, especially high-pressure fuel pump Expired - Fee Related CN107002614B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014225982.7A DE102014225982A1 (en) 2014-12-16 2014-12-16 Pump, in particular high-pressure fuel pump
DE102014225982.7 2014-12-16
PCT/EP2015/074890 WO2016096216A1 (en) 2014-12-16 2015-10-27 Pump, in particular a high-pressure fuel pump

Publications (2)

Publication Number Publication Date
CN107002614A true CN107002614A (en) 2017-08-01
CN107002614B CN107002614B (en) 2019-12-03

Family

ID=54365229

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201580068162.1A Expired - Fee Related CN107002614B (en) 2014-12-16 2015-10-27 Pump, especially high-pressure fuel pump

Country Status (7)

Country Link
US (1) US10125749B2 (en)
EP (1) EP3234358A1 (en)
JP (2) JP2018500495A (en)
KR (1) KR20170096143A (en)
CN (1) CN107002614B (en)
DE (1) DE102014225982A1 (en)
WO (1) WO2016096216A1 (en)

Cited By (1)

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